Bill Morton has apologised again to pupils

Mr Galbraith is expected to take the first opportunity to make a statement on the controversy when the Scottish Parliament reconvenes next week.

But the Tories and the Scottish National Party called for a three-hour debate or an extended statement from the under-fire minister when the cross-party bureau which sets the parliamentary agenda met on Tuesday.

Opposition leaders accused ministers of "running scared" - but the Executive insisted it would put the full facts before MSPs.

The SQA confirmed on Tuesday that 5,000 Standard Grades were incomplete.

A spokesman said the vast majority of cases would be easy to rectify and should be corrected within the week.

Incomplete results

SQA interim chief executive Bill Morton called for the review of all Standard Grade results in the light of the problems with the Higher results.

More than 5,000 Highers candidates received inaccurate or incomplete results earlier this month.

Some young people are still waiting for their Higher results almost three weeks on - although the SQA said the number still outstanding was very small.

Pupils should receive correct results this week

Mr Morton has again issued an apology to pupils for the problems.

On Monday he announced details of a month-long internal review of the SQA, which will look at the processes, structures and behaviour within the organisation.

It will identify the immediate changes needed to make sure there is no repeat of the problems next year.

"It goes without saying that the status quo for this organisation is not an option," he said.

The Educational Institute of Scotland has claimed that the exams chaos was caused by the authorities' failure to listen to teachers.

The union described the situation as a "disaster" and said future alterations to exam arrangements must fully involve schools, classroom teachers and union officials.